The Wellgo LU-313 Pedals feature a classic 1-piece aluminum DX-style body and a 9/16" CrMo spindle. It includes 20 screw-in replaceable pins with a large surface area that provides a great grip with no slip!! For real!! It's spindles are made on 9/16" size to fit all 3-piece cranks. The pedal reflectors attached to it are removable to make them race issue pedals, or you can leave them on for safe street riding. Extra replaceable pins not included.